/Engine/Source/Runtime/Landscape/Classes/LandscapeNaniteComponent.h
Generates the Nanite static mesh, stores the content Id.
true if the Nanite mesh creation was successful
bool InitializeForLandscape ( [ALandscapeProxy](API\Runtime\Landscape\ALandscapeProxy) * Landscape, const [FGuid](API\Runtime\Core\Misc\FGuid) & NewProxyContentId, const [TArrayView](API\Runtime\Core\Containers\TArrayView)< [ULandscapeComponent](API\Runtime\Landscape\ULandscapeComponent) * > & InComponentsToExport, int32 InNaniteComponentIndex )